RLC circuits in parallel

hi there, i'm desperately stuck on the last part of this assignment and i've been tearing my hair out trying to get it down.

i have a circuit consisting of a resistor and inductor in series, and a capacitor in parallel. i've worked out the current and phase angle in the individual branches but i'm stuck on how to get i and θ for the whole circuit. do i use the reciprocal formula similar to parallel resistors? i didn't understand the explanation in the main textbook on here because i havn't studied complex numbers before and it seemed to use them quite a lot.